1 /* include/jemalloc/internal/jemalloc_internal_defs.h. Generated from jemalloc_internal_defs.h.in by configure. */ 2 #ifndef JEMALLOC_INTERNAL_DEFS_H_ 3 #define JEMALLOC_INTERNAL_DEFS_H_ 4 /* 5 * If JEMALLOC_PREFIX is defined via --with-jemalloc-prefix, it will cause all 6 * public APIs to be prefixed. This makes it possible, with some care, to use 7 * multiple allocators simultaneously. 8 */ 9 #define JEMALLOC_PREFIX "je_" 10 #define JEMALLOC_CPREFIX "JE_" 11 12 /* 13 * JEMALLOC_PRIVATE_NAMESPACE is used as a prefix for all library-private APIs. 14 * For shared libraries, symbol visibility mechanisms prevent these symbols 15 * from being exported, but for static libraries, naming collisions are a real 16 * possibility. 17 */ 18 #define JEMALLOC_PRIVATE_NAMESPACE je_ 19 20 /* 21 * Hyper-threaded CPUs may need a special instruction inside spin loops in 22 * order to yield to another virtual CPU. 23 */ 24 #ifdef __x86_64__ 25 #define CPU_SPINWAIT __asm__ volatile("pause") 26 #else 27 #define CPU_SPINWAIT 28 #endif 29 30 /* Defined if C11 atomics are available. */ 31 #define JEMALLOC_C11ATOMICS 1 32 33 /* Defined if the equivalent of FreeBSD's atomic(9) functions are available. */ 34 /* #undef JEMALLOC_ATOMIC9 */ 35 36 /* 37 * Defined if OSAtomic*() functions are available, as provided by Darwin, and 38 * documented in the atomic(3) manual page. 39 */ 40 /* #undef JEMALLOC_OSATOMIC */ 41 42 /* 43 * Defined if __sync_add_and_fetch(uint32_t *, uint32_t) and 44 * __sync_sub_and_fetch(uint32_t *, uint32_t) are available, despite 45 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 not being defined (which means the 46 * functions are defined in libgcc instead of being inlines). 47 */ 48 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_4 */ 49 50 /* 51 * Defined if __sync_add_and_fetch(uint64_t *, uint64_t) and 52 * __sync_sub_and_fetch(uint64_t *, uint64_t) are available, despite 53 * __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 not being defined (which means the 54 * functions are defined in libgcc instead of being inlines). 55 */ 56 /* #undef JE_FORCE_SYNC_COMPARE_AND_SWAP_8 */ 57 58 /* 59 * Defined if __builtin_clz() and __builtin_clzl() are available. 60 */ 61 #define JEMALLOC_HAVE_BUILTIN_CLZ 62 63 /* 64 * Defined if os_unfair_lock_*() functions are available, as provided by Darwin. 65 */ 66 /* #undef JEMALLOC_OS_UNFAIR_LOCK */ 67 68 /* 69 * Defined if OSSpin*() functions are available, as provided by Darwin, and 70 * documented in the spinlock(3) manual page. 71 */ 72 /* #undef JEMALLOC_OSSPIN */ 73 74 /* Defined if syscall(2) is usable. */ 75 /* Syscalls are available in Android, but avoid them for security reasons. */ 76 /* #undef JEMALLOC_USE_SYSCALL */ 77 78 /* 79 * Defined if secure_getenv(3) is available. 80 */ 81 /* #undef JEMALLOC_HAVE_SECURE_GETENV */ 82 83 /* 84 * Defined if issetugid(2) is available. 85 */ 86 /* #undef JEMALLOC_HAVE_ISSETUGID */ 87 88 /* Defined if pthread_atfork(3) is available. */ 89 #define JEMALLOC_HAVE_PTHREAD_ATFORK 90 91 /* 92 * Defined if clock_gettime(CLOCK_MONOTONIC_COARSE, ...) is available. 93 */ 94 #define JEMALLOC_HAVE_CLOCK_MONOTONIC_COARSE 1 95 96 /* 97 * Defined if clock_gettime(CLOCK_MONOTONIC, ...) is available. 98 */ 99 #define JEMALLOC_HAVE_CLOCK_MONOTONIC 1 100 101 /* 102 * Defined if mach_absolute_time() is available. 103 */ 104 /* #undef JEMALLOC_HAVE_MACH_ABSOLUTE_TIME */ 105 106 /* 107 * Defined if _malloc_thread_cleanup() exists. At least in the case of 108 * FreeBSD, pthread_key_create() allocates, which if used during malloc 109 * bootstrapping will cause recursion into the pthreads library. Therefore, if 110 * _malloc_thread_cleanup() exists, use it as the basis for thread cleanup in 111 * malloc_tsd. 112 */ 113 /* #undef JEMALLOC_MALLOC_THREAD_CLEANUP */ 114 115 /* 116 * Defined if threaded initialization is known to be safe on this platform. 117 * Among other things, it must be possible to initialize a mutex without 118 * triggering allocation in order for threaded allocation to be safe. 119 */ 120 #define JEMALLOC_THREADED_INIT 121 122 /* 123 * Defined if the pthreads implementation defines 124 * _pthread_mutex_init_calloc_cb(), in which case the function is used in order 125 * to avoid recursive allocation during mutex initialization. 126 */ 127 /* #undef JEMALLOC_MUTEX_INIT_CB */ 128 129 /* Non-empty if the tls_model attribute is supported. */ 130 #define JEMALLOC_TLS_MODEL 131 132 /* JEMALLOC_CC_SILENCE enables code that silences unuseful compiler warnings. */ 133 #define JEMALLOC_CC_SILENCE 134 135 /* JEMALLOC_CODE_COVERAGE enables test code coverage analysis. */ 136 /* #undef JEMALLOC_CODE_COVERAGE */ 137 138 /* 139 * JEMALLOC_DEBUG enables assertions and other sanity checks, and disables 140 * inline functions. 141 */ 142 /* #undef JEMALLOC_DEBUG */ 143 144 /* JEMALLOC_STATS enables statistics calculation. */ 145 #define JEMALLOC_STATS 146 147 /* JEMALLOC_PROF enables allocation profiling. */ 148 /* #undef JEMALLOC_PROF */ 149 150 /* Use libunwind for profile backtracing if defined. */ 151 /* #undef JEMALLOC_PROF_LIBUNWIND */ 152 153 /* Use libgcc for profile backtracing if defined. */ 154 /* #undef JEMALLOC_PROF_LIBGCC */ 155 156 /* Use gcc intrinsics for profile backtracing if defined. */ 157 /* #undef JEMALLOC_PROF_GCC */ 158 159 /* 160 * JEMALLOC_TCACHE enables a thread-specific caching layer for small objects. 161 * This makes it possible to allocate/deallocate objects without any locking 162 * when the cache is in the steady state. 163 */ 164 /* ANDROID: The tcache is enabled/disabled in the Makefile, not here. */ 165 /* #undef JEMALLOC_TCACHE */ 166 167 /* 168 * JEMALLOC_DSS enables use of sbrk(2) to allocate chunks from the data storage 169 * segment (DSS). 170 */ 171 /* #undef JEMALLOC_DSS */ 172 173 /* Support memory filling (junk/zero/quarantine/redzone). */ 174 #define JEMALLOC_FILL 175 176 /* Support utrace(2)-based tracing. */ 177 /* #undef JEMALLOC_UTRACE */ 178 179 /* Support Valgrind. */ 180 /* #undef JEMALLOC_VALGRIND */ 181 182 /* Support optional abort() on OOM. */ 183 /* #undef JEMALLOC_XMALLOC */ 184 185 /* Support lazy locking (avoid locking unless a second thread is launched). */ 186 /* #undef JEMALLOC_LAZY_LOCK */ 187 188 /* Minimum size class to support is 2^LG_TINY_MIN bytes. */ 189 #define LG_TINY_MIN 3 190 191 /* 192 * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size 193 * classes). 194 */ 195 /* #undef LG_QUANTUM */ 196 197 /* One page is 2^LG_PAGE bytes. */ 198 #define LG_PAGE 12 199 200 /* 201 * If defined, adjacent virtual memory mappings with identical attributes 202 * automatically coalesce, and they fragment when changes are made to subranges. 203 * This is the normal order of things for mmap()/munmap(), but on Windows 204 * VirtualAlloc()/VirtualFree() operations must be precisely matched, i.e. 205 * mappings do *not* coalesce/fragment. 206 */ 207 #define JEMALLOC_MAPS_COALESCE 208 209 /* 210 * If defined, use munmap() to unmap freed chunks, rather than storing them for 211 * later reuse. This is disabled by default on Linux because common sequences 212 * of mmap()/munmap() calls will cause virtual memory map holes. 213 */ 214 /* #undef JEMALLOC_MUNMAP */ 215 216 /* TLS is used to map arenas and magazine caches to threads. */ 217 /* #undef JEMALLOC_TLS */ 218 219 /* 220 * Used to mark unreachable code to quiet "end of non-void" compiler warnings. 221 * Don't use this directly; instead use unreachable() from util.h 222 */ 223 #define JEMALLOC_INTERNAL_UNREACHABLE __builtin_unreachable 224 225 /* 226 * ffs*() functions to use for bitmapping. Don't use these directly; instead, 227 * use ffs_*() from util.h. 228 */ 229 #define JEMALLOC_INTERNAL_FFSLL __builtin_ffsll 230 #define JEMALLOC_INTERNAL_FFSL __builtin_ffsl 231 #define JEMALLOC_INTERNAL_FFS __builtin_ffs 232 233 /* 234 * JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside 235 * within jemalloc-owned chunks before dereferencing them. 236 */ 237 /* #undef JEMALLOC_IVSALLOC */ 238 239 /* 240 * If defined, explicitly attempt to more uniformly distribute large allocation 241 * pointer alignments across all cache indices. 242 */ 243 #define JEMALLOC_CACHE_OBLIVIOUS 244 245 /* 246 * Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings. 247 */ 248 /* #undef JEMALLOC_ZONE */ 249 /* #undef JEMALLOC_ZONE_VERSION */ 250 251 /* 252 * Methods for determining whether the OS overcommits. 253 * JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY: Linux's 254 * /proc/sys/vm.overcommit_memory file. 255 * JEMALLOC_SYSCTL_VM_OVERCOMMIT: FreeBSD's vm.overcommit sysctl. 256 */ 257 /* #undef JEMALLOC_SYSCTL_VM_OVERCOMMIT */ 258 #define JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY 259 260 /* Defined if madvise(2) is available. */ 261 #define JEMALLOC_HAVE_MADVISE 262 263 /* 264 * Methods for purging unused pages differ between operating systems. 265 * 266 * madvise(..., MADV_FREE) : This marks pages as being unused, such that they 267 * will be discarded rather than swapped out. 268 * madvise(..., MADV_DONTNEED) : This immediately discards pages, such that 269 * new pages will be demand-zeroed if the 270 * address region is later touched. 271 */ 272 /* #undef JEMALLOC_PURGE_MADVISE_FREE */ 273 #define JEMALLOC_PURGE_MADVISE_DONTNEED 274 275 /* 276 * Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE 277 * arguments to madvise(2). 278 */ 279 /* ANDROID: Do not enable huge pages because it can increase PSS. */ 280 /* #undef JEMALLOC_THP */ 281 282 /* Define if operating system has alloca.h header. */ 283 #define JEMALLOC_HAS_ALLOCA_H 1 284 285 /* C99 restrict keyword supported. */ 286 #define JEMALLOC_HAS_RESTRICT 1 287 288 /* For use by hash code. */ 289 /* #undef JEMALLOC_BIG_ENDIAN */ 290 291 /* sizeof(int) == 2^LG_SIZEOF_INT. */ 292 #define LG_SIZEOF_INT 2 293 294 /* sizeof(long) == 2^LG_SIZEOF_LONG. */ 295 #ifdef __LP64__ 296 #define LG_SIZEOF_LONG 3 297 #else 298 #define LG_SIZEOF_LONG 2 299 #endif 300 301 /* sizeof(long long) == 2^LG_SIZEOF_LONG_LONG. */ 302 #define LG_SIZEOF_LONG_LONG 3 303 304 /* sizeof(intmax_t) == 2^LG_SIZEOF_INTMAX_T. */ 305 #define LG_SIZEOF_INTMAX_T 3 306 307 /* glibc malloc hooks (__malloc_hook, __realloc_hook, __free_hook). */ 308 /* #undef JEMALLOC_GLIBC_MALLOC_HOOK */ 309 310 /* glibc memalign hook. */ 311 /* #undef JEMALLOC_GLIBC_MEMALIGN_HOOK */ 312 313 /* Adaptive mutex support in pthreads. */ 314 /* #undef JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP */ 315 316 /* 317 * If defined, jemalloc symbols are not exported (doesn't work when 318 * JEMALLOC_PREFIX is not defined). 319 */ 320 #define JEMALLOC_EXPORT 321 322 /* config.malloc_conf options string. */ 323 #define JEMALLOC_CONFIG_MALLOC_CONF "" 324 325 #endif /* JEMALLOC_INTERNAL_DEFS_H_ */ 326
